便びん乗じょう主しゅ義ぎ者しゃ

noun

opportunist

A person who takes advantage of situations for personal gain, often without principles.

• 彼かれは便びん乗じょう主しゅ義ぎ者しゃで、いつも他た人にんの成せい功こうに乗のっかろうとする。

  He is an opportunist, always trying to ride on others' success.

• 便びん乗じょう主しゅ義ぎ者しゃは状じょう況きょうが変かわるとすぐに意い見けんを変かえる。

  Opportunists quickly change their opinions when the situation changes.